/* Miyu密语 Flashcards — marketing site. Extends the app's design system:
   warm near-black ground, honey accent, oxblood depth, JetBrains-mono labels,
   tone-colored pinyin. Dark-only, deliberately, to match the product. */

@font-face{
  font-family:"Archivo Black";
  src:url("fonts/ArchivoBlack-Regular.ttf") format("truetype");
  font-weight:400;font-display:swap;
}

:root{
  --ink:#0E0A06;          /* warm near-black ground (app appBg) */
  --ink-2:#17100A;        /* raised panel */
  --ink-3:#1F1610;        /* card */
  --oxblood:#2A0F0C;      /* hero depth */
  --honey:#F5B645;        /* accent */
  --honey-soft:#F7C25C;
  --cream:#FFF8EC;        /* headlines */
  --paper:#E7DAC1;        /* body */
  --muted:#9C8E78;        /* warm grey — biased toward honey, chosen not default */
  --hair:rgba(245,182,69,.15);
  --t1:#FF5A5F; --t2:#3FBF6A; --t3:#4DA3FF; --t4:#B07CF0; --t5:#8A8073;
  --maxw:1040px;
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Inter","Segoe UI",Roboto,sans-serif;
  --hanzi:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",var(--sans);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ink);color:var(--paper);
  font-family:var(--sans);font-size:17px;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  background-image:
    radial-gradient(120% 80% at 50% -10%, rgba(42,15,12,.85), transparent 60%),
    linear-gradient(rgba(245,182,69,.028) 1px,transparent 1px),
    linear-gradient(90deg,rgba(245,182,69,.028) 1px,transparent 1px);
  background-size:auto, 30px 30px, 30px 30px;
  background-attachment:fixed;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
a{color:var(--honey-soft);text-decoration:none}
a:hover{color:var(--honey)}
:focus-visible{outline:2px solid var(--honey);outline-offset:3px;border-radius:4px}

h1,h2,h3{margin:0;color:var(--cream);text-wrap:balance;line-height:1.05;font-weight:400}
.display{font-family:"Archivo Black",var(--sans)}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--honey);opacity:.9}
.lede{font-size:20px;color:var(--paper);line-height:1.55}
@media(min-width:720px){ .lede{font-size:22px} }

/* Header */
header{position:relative;z-index:2}
.bar{display:flex;align-items:center;justify-content:space-between;padding:22px 0 6px}
.brand{height:34px;display:block}
.bar nav{display:flex;gap:22px;align-items:center;font-size:14px}
.bar nav a{color:var(--paper)}
@media(max-width:560px){ .bar nav{display:none} }

/* Hero */
.hero{position:relative;padding:52px 0 30px;text-align:center}
.hero h1{font-size:clamp(38px,7.5vw,72px);letter-spacing:-.01em;margin:16px auto 0;max-width:14ch}
.hero .lede{margin:22px auto 0;max-width:56ch}
.cta-row{display:flex;gap:16px;align-items:center;justify-content:center;flex-wrap:wrap;margin-top:34px}
.badge{display:inline-flex;align-items:center;gap:11px;background:var(--cream);color:#0b0b0c;
  padding:12px 20px;border-radius:14px;font-weight:600;font-size:16px;transition:transform .15s ease}
.badge:hover{transform:translateY(-1px);color:#0b0b0c}
.badge svg{width:22px;height:22px}
.badge small{display:block;font-size:10px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;opacity:.6;line-height:1.1}
.badge b{font-size:18px;font-weight:700;line-height:1.1}
.meta-note{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}

/* Signature flashcard */
.card{position:relative;margin:44px auto 0;max-width:460px;
  background:linear-gradient(160deg,var(--ink-3),var(--ink-2));
  border:1px solid var(--hair);border-radius:26px;padding:44px 32px 34px;
  box-shadow:0 40px 90px -50px rgba(0,0,0,.9), inset 0 1px 0 rgba(255,255,255,.03);}
.ruby{display:flex;gap:.28em;justify-content:center;align-items:flex-end;font-size:26px;font-weight:600;letter-spacing:.01em}
.ruby span{display:block;text-align:center;min-width:1.4em}
/* Signature: the hanzi + native tone overlay, exported from the app as a
   transparent PNG (the real ToneText raster — the blurred tone contours can't
   be reproduced in CSS). The pinyin ruby + gloss stay as live text. */
.glyph-img{display:block;margin:0 auto;width:auto;max-width:100%}
.card .glyph-img{height:clamp(150px,34vw,208px);margin-top:6px}
.word .glyph-img{height:clamp(60px,15vw,84px);margin-top:4px}
.gloss{margin-top:14px;color:var(--muted);font-size:15px}
.gloss em{color:var(--paper);font-style:normal}
.t1{color:var(--t1)} .t2{color:var(--t2)} .t3{color:var(--t3)} .t4{color:var(--t4)} .t5{color:var(--t5)}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:30px 0 6px}
.chip{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);border:1px solid var(--hair);border-radius:999px;padding:7px 13px}

/* Sections */
section{position:relative;z-index:1;padding:64px 0}
.rule{height:1px;background:linear-gradient(90deg,transparent,var(--hair),transparent);border:0;margin:0}
.sec-head{max-width:60ch}
.sec-head h2{font-size:clamp(26px,4.4vw,40px);letter-spacing:-.01em}
.sec-head p{margin:16px 0 0;font-size:18px;color:var(--paper)}
.sec-head .eyebrow{display:block;margin-bottom:14px}

.words{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.word{background:var(--ink-2);border:1px solid var(--hair);border-radius:16px;padding:18px 20px 16px;min-width:120px;flex:1 1 120px;text-align:center}
.word .ruby{font-size:15px}
.word .en{margin-top:8px;color:var(--muted);font-size:13px}

.grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:36px}
@media(min-width:680px){ .grid{grid-template-columns:1fr 1fr} }
.feat{background:var(--ink-2);border:1px solid var(--hair);border-radius:18px;padding:26px 24px}
.feat h3{font-size:20px;margin-bottom:8px}
.feat p{margin:0;color:var(--paper);font-size:16px;line-height:1.55}
.feat .k{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--honey);display:block;margin-bottom:12px}

.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:36px}
@media(min-width:680px){ .stats{grid-template-columns:repeat(4,1fr)} }
.stat{text-align:center;padding:22px 12px;border:1px solid var(--hair);border-radius:16px;background:rgba(255,255,255,.015)}
.stat b{display:block;font-family:"Archivo Black",var(--sans);font-size:30px;color:var(--cream);font-variant-numeric:tabular-nums}
.stat span{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}

.close{text-align:center;padding:72px 0}
.close h2{font-size:clamp(28px,5vw,44px)}
.close .cta-row{margin-top:30px}

/* Prose (privacy / support) */
.page-head{padding:44px 0 8px}
.page-head h1{font-size:clamp(30px,5vw,46px)}
.page-head .eyebrow{display:block;margin-bottom:14px}
.prose{max-width:68ch;padding:28px 0 60px}
.prose h2{font-size:22px;margin:38px 0 10px;color:var(--cream)}
.prose h2:first-child{margin-top:0}
.prose p{margin:0 0 16px;color:var(--paper)}
.prose ul{margin:0 0 16px;padding-left:22px}
.prose li{margin:0 0 8px;color:var(--paper)}
.prose strong{color:var(--cream)}
.prose .updated{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:26px}
.prose a{color:var(--honey-soft);border-bottom:1px solid var(--hair)}

footer{border-top:1px solid var(--hair);padding:34px 0 56px;color:var(--muted);font-size:14px;position:relative;z-index:1}
.foot{display:flex;flex-wrap:wrap;gap:10px 26px;align-items:center;justify-content:space-between}
.foot nav{display:flex;gap:22px;flex-wrap:wrap}
.foot a{color:var(--paper)}
.foot .fine{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--muted);width:100%;margin-top:8px}

@media(prefers-reduced-motion:reduce){*{transition:none!important}}